AuthorTopic: LabSub Cluster dB (Read 2469 times)

Just wondering if someone could possibly give me a guesstimate for the output on a cluster of 4 LabSubs. I currently using a Crown XLS5000 to run all four subs. It sounds pretty good but I know I'm not getting the maximum output for these subs. If I only hooked 2 subs up in stereo instead of the four, would I get more dB's or close to the same since I know 4 subs in a cluster adds about 6 more dB. Also, I am using a dedicated 20amp generator, 120v.Here are the specs for the xls5000 amp:8-ohm Stereo (per channel)1 kHz Continuous AveragePower with 0.1% THD1,100W1,800W2,500W*3,600W8-ohm Bridge-Mono2-ohm Stereo (per channel)4-ohm Stereo (per channel)XLS 5000*with 1% THD.4-ohm Bridge-Mono5,000W*

You want to use them all 4 together if possible. They will be more efficient at lower frequencies this way.

What you need is a different amp. I've never used the XLS5000 and been happy with it. Get a 4 pack of RMS1850HD's maybe? Or if you can an Itech x000. It will make a noticeable difference in your output.

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Bullwinkle: This is the amplifier, which amplifies the sound. This is the Preamplifier which, of course, amplifies the pree's.

You want to use them all 4 together if possible. They will be more efficient at lower frequencies this way.

What you need is a different amp. I've never used the XLS5000 and been happy with it. Get a 4 pack of RMS1850HD's maybe? Or if you can an Itech x000. It will make a noticeable difference in your output.

You want to use them all 4 together if possible. They will be more efficient at lower frequencies this way.

What you need is a different amp. I've never used the XLS5000 and been happy with it. Get a 4 pack of RMS1850HD's maybe? Or if you can an Itech x000. It will make a noticeable difference in your output.

Thanks, kinda what i figured. I only play 2 or 3 outdoor venues a year so not looking for other purchases.

To see what's the most you can get with what you have, I would put all four boxes in series-parallel so they equal the load of one box,and then put that across the amp in bridge mono.

edit: pls nevermind, no advantage gained using above recommendationI looked at amps specs again and see there is no difference, either in power or load per channel,in just paralleling two boxes across each channel

Thanks, kinda what i figured. I only play 2 or 3 outdoor venues a year so not looking for other purchases.

Travis,

The LabSub impedance drops to only 2.2 ohms at Fc and a few other frequencies, with a pair per side in parallel the amp would see as little as 1.1 ohms and may current limit well below full power. It may actually put out more power with a pair in series per side.